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Учет межзвездного поглощения - необходимый этап в процессе параметризации звезд по многоцветной фотометрии. Мы анализируем опубликованные законы межзвездного поглощения и обсуждаем возможность оценки величины межзвездного поглощения для... more
Учет межзвездного поглощения - необходимый этап в процессе параметризации звезд по многоцветной фотометрии. Мы анализируем опубликованные законы межзвездного поглощения и обсуждаем возможность оценки величины межзвездного поглощения для фотометрических полос современных больших обзоров. Taking into account interstellar extinction is the necessary procedure in the process of parameterization of stars from multicolor photometry. We analyze published interstellar extinction laws and discuss the possibility of assessing the interstellar extinction in photometric bands of modern large surveys.
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The WSO-UV (World Space Observatory - Ultraviolet) project is intended to built and operate an international space observatory designed for observations in the UV (115 – 310 nm) range, where some of the most important astrophysical... more
The WSO-UV (World Space Observatory - Ultraviolet) project is intended to built and operate an international space observatory designed for observations in the UV (115 – 310 nm) range, where some of the most important astrophysical processes can be efficiently studied. It is the solution to the problem of future access to UV spectroscopy. Dedicated to spectroscopic and imaging observations of the ultraviolet sky, the World Space Observatory - Ultraviolet mission is a Russian-Spanish collaboration with potential Mexican minor contribution. This paper provides a summary on the project, its status and the major outcomes since the last SPIE meeting.
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The World Space Observatory for Ultraviolet (WSO–UV) is a space observatory equipped with instrumentation for spectroscopy and for imaging in the UV spectral range. After the Hubble Space Telescope, WSO–UV will be the largest mirror... more
The World Space Observatory for Ultraviolet (WSO–UV) is a space observatory equipped with instrumentation for spectroscopy and for imaging in the UV spectral range. After the Hubble Space Telescope, WSO–UV will be the largest mirror telescope for UV astronomy. Thus, the WSO-UV space observatory will guarantee continuity of UV observation of comets and exoplanets.
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In this article we consider the prospects of research on comets and exoplanets using instruments onboard the WSO-UV mission. Ultraviolet spectroscopy at 115-310 nm is a powerful tool for studying comets, since this range of the... more
In this article we consider the prospects of research on comets and exoplanets using instruments onboard the WSO-UV mission. Ultraviolet spectroscopy at 115-310 nm is a powerful tool for studying comets, since this range of the electromagnetic spectrum contains most of the resonance lines of atoms, molecules and ions. The spectrographs on board the WSO-UV spacecraft will become one of the most important instruments for spectral studies of comets and exoplanets after 2025.
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We have determined new statistical relations to estimate the fundamental atmospheric parameters of effective temperature and surface gravity, using MK spectral classification, and vice versa. The relations were constructed based on the... more
We have determined new statistical relations to estimate the fundamental atmospheric parameters of effective temperature and surface gravity, using MK spectral classification, and vice versa. The relations were constructed based on the published calibration tables (for main sequence stars) and observational data from stellar spectral atlases (for giants and supergiants). These new relations were applied to field giants with known atmospheric parameters, and the results of the comparison of our estimations with available spectral classification have been quite satisfactory.
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The World Space Observatory Ultraviolet (WSO - UV) is an international mission, currently Russia and Spain are the main contributors to the project. The WSO-UV payload consists of a 1.7-m telescope and instrumentation: high resolution... more
The World Space Observatory Ultraviolet (WSO - UV) is an international mission, currently Russia and Spain are the main contributors to the project. The WSO-UV payload consists of a 1.7-m telescope and instrumentation: high resolution echelle spectrographs for far UV (115-175 nm) and near UV (174-310 nm) wavelength range, low resolution long slit UV spectrograph for 115-310 nm spectral diapason and UV imaging cameras also for far and near UV. For many astrophysical tasks of the mission Core program orbital UV observations should be expanded to the optical range of 300-1000 nm. In this paper we discuss spectroscopic and imaging instrumentations of Russian telescopes to be used as project ground support.
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The parameterization of stars is a well-known problem and used for various purposes in astronomy. We have shown that multicolor photometric data from large modern surveys can be used for parameterization of stars. With sufficiently good... more
The parameterization of stars is a well-known problem and used for various purposes in astronomy. We have shown that multicolor photometric data from large modern surveys can be used for parameterization of stars. With sufficiently good quality photometry, one may compute a 3D extinction map by comparing catalogued multicolor photometry with photometry derived from the secondary estimators such as the distance modulus and the interstellar extinction law with suitable calibration tables for absolute magnitudes with reasonable spectral types, extinctions and distances.
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The study of the stellar physical properties as well as the spatial distribution of interstellar extinction, is important for many investigations of galactic and extragalactic objects. We have developed a method for determination of... more
The study of the stellar physical properties as well as the spatial distribution of interstellar extinction, is important for many investigations of galactic and extragalactic objects. We have developed a method for determination of stellar parameters and interstellar extinctions from multicolor photometry. This method was applied to objects drawn from modern large photometric surveys and, in this work, we give a review of the surveys and discuss problems of cross-identification.
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Research Interests: Physics and Spectrograph
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Research Interests: Physics and Astrobiology
В работе предложена концепция широкоугольного УФ телескопа небольшой апертуры для проведения обзорных наблюдений в УФ с поверхности Луны с целью устранения неполноты каталога УФ-источников GALEX, а также для решения ряда других научных... more
В работе предложена концепция широкоугольного УФ телескопа небольшой апертуры для проведения обзорных наблюдений в УФ с поверхности Луны с целью устранения неполноты каталога УФ-источников GALEX, а также для решения ряда других научных задач, решение которых затруднено при использовании наземных телескопов. Кратко рассмотрены варианты оптической схемы, способов наведения телескопа, предложены научные светофильтры и современный КМОП детектор. We present the concept of a small-aperture wide field UV telescope for conducting survey observations in UV from the Moon surface in order to eliminate the incompleteness of the GALEX catalog of UV sources, as well as to solve a number of other scientific problems that are difficult to solve when using ground-based telescopes. We briefly discuss the variants of the optical scheme, methods of pointing the telescope, scientific light filters and a modern CMOS detector.
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Developing methods for analyzing and extracting information from modern sky surveys is a challenging task in astrophysical studies and is important for many investigations of galactic and extragalactic objects. We have designed a method... more
Developing methods for analyzing and extracting information from modern sky surveys is a challenging task in astrophysical studies and is important for many investigations of galactic and extragalactic objects. We have designed a method for determination of stellar parameters and interstellar extinctions from multicolor photometry. This method was applied to objects drawn from modern large photometric surveys. In this work, we give a review of the surveys and discuss problems of cross-identification, paying particular attention to the information flags contained in the surveys. Also we have determined new statistical relations to estimate the stellar atmospheric parameters using MK spectral classification.
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Research Interests: Physics and Solar System
We present the result of comparison of Gaia DR2 parallaxes and photometry with data derived from a combined analysis of 2MASS, SDSS, GALEX, and UKIDSS surveys in four selected high-latitude sky areas. We have shown that, under certain... more
We present the result of comparison of Gaia DR2 parallaxes and photometry with data derived from a combined analysis of 2MASS, SDSS, GALEX, and UKIDSS surveys in four selected high-latitude sky areas. We have shown that, under certain circumstances, multicolor photometric data from large modern surveys can be successfully used for parameterization of stars, including estimation of distance and interstellar extinction value.
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Information on interstellar extinction and dust properties may be obtained from modern large photometric surveys data. Virtual Observatory facilities allow users to make a fast and correct cross-identification of objects from various... more
Information on interstellar extinction and dust properties may be obtained from modern large photometric surveys data. Virtual Observatory facilities allow users to make a fast and correct cross-identification of objects from various surveys. It yields a multicolor photometry data on detected objects and makes it possible to estimate stellar parameters and calculate interstellar extinction. A 3D extinction map then can be constructed. The method was applied to 2MASS, SDSS, GALEX and UKIDSS surveys. Results for several high-latitude areas are obtained, compared with independent sources and discussed here.